exception are "interactive" files such as console windows. For these
line buffered output is used.
- Whether or not a file is bound to an interactive device, such as a
console window, is now checked and remembered after a file descriptor
has been associated with it.
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14788 87f5fb63-7c3d-0410-a384-fd976d0f7a62